1 files changed, 40 insertions, 0 deletions
diff --git a/toolkit/components/printing/tests/browser_preview_print_coop.js b/toolkit/components/printing/tests/browser_preview_print_coop.js
new file mode 100644
index 0000000000..b635ca82a7
--- /dev/null
+++ b/toolkit/components/printing/tests/browser_preview_print_coop.js
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_PATH = getRootDirectory(gTestPath).replace(
+  "chrome://mochitests/content",
+  "https://example.com"
+);
+
+/**
+ * Verify if the page with a COOP header can be used for printing preview.
+ */
+add_task(async function test() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["print.tab_modal.enabled", false]],
+  });
+
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    `${TEST_PATH}file_coop_header.html`
+  );
+
+  // Enter print preview
+  let ppBrowser = PrintPreviewListener.getPrintPreviewBrowser();
+  let ppPromise = PrintHelper.waitForOldPrintPreview(ppBrowser);
+  document.getElementById("cmd_printPreview").doCommand();
+  await ppPromise;
+
+  await BrowserTestUtils.waitForCondition(
+    () => gInPrintPreviewMode,
+    "Should be in print preview mode now."
+  );
+
+  ok(true, "We did not crash.");
+
+  PrintUtils.exitPrintPreview();
+
+  BrowserTestUtils.removeTab(tab);
+});